IFA Promotion is to encourage people inheriting money to plan their finances to avoid tax.
It believes it is likely that the Government will look to raise more revenue from IHT. It will produce a guide on IHT planning after the Chancellor's Green Budget on November 25.
IFAP quotes findings from research firm Mintel showing that around 1.5 million people will inherit a total of £26bn in 1997/88.
Manager Ann-Marie Martyn says: "With less than one in 10 estates taxed, raising just £1.5bn, or around 1.5 per cent of the total tax take, it seems likely that the Chancellor will see an opportunity to raise extra revenue from inheritances. Our free Green Budget Guide to Planning a Legacy or Receiving an Inheritance is designed to help and will be available shortly after the Chancellor's announcement."